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Overview of Components

CPUFAN1,SYSFAN1~3: Fan Connectors

Fan connectors can be classified as PWM (Pulse Width Modulation) Mode and Voltage

Mode. PWM Mode fan connectors provide constant 12V output and adjust fan speed

with speed control signal. Voltage Mode fan connectors control fan speed by changing

voltage. Therefore, when you plug a 3-pin (Non-PWM) fan to a PWM Mode fan

connector, the fan speed will be always maintained at 100%, and that could be noisy.

CPUFAN1

1 Ground 2 +12V

3 Sense 4 Speed Control Signal

SYSFAN1/ SYSFAN3 SYSFAN2

1 Ground 2 Voltage Control

3 Sense 4 NC

PWM Mode fan connector

Voltage Mode fan connector

Controlling the fan speed

There are two ways to manage fan speed. One is to go to BIOS > HARDWARE

MONITOR. The other is to use COMMAND CENTER application.

BIOS > HARDWARE MONITOR COMMAND CENTER

Both methods offer gradient points of the fan speed that allow you to adjust fan speed

in relation to CPU temperature.

Questions and Answers:

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MSI B150M MORTAR ARCTIC Specifications

General